Filter element



FIG. 1 is an elevated perspective view of the filter element, with portions of the element shown in phantom which form no part of the claimed design;

FIG. 2 is a side view of the filter element of FIG. 1;

FIG. 3 is a top end view of the filter element of FIG. 1; and,

FIG. 4 is a bottom plan view of the filter element of FIG. 1. 

The ornamental design for a filter element, as shown and described. 